The gallery shortcode works by pulling in all the image attachments from the current post. You can select a column style, increase the image height and exclude images via their ID’s.
[heading title=”Galleries look great!” margin_bottom=”20px”]
[wpex_gallery image_height=”80%” columns=3]
[heading title=”2,3,4,5,6 Columns Options” margin_bottom=”20px” ]
[wpex_gallery image_height=”90%” columns=2 exclude=4624]
[wpex_gallery image_height=”90%” columns=3]
[wpex_gallery image_height=”90%” columns=4]
[wpex_gallery image_height=”90%” columns=5]
[wpex_gallery image_height=”90%” columns=6]